Correct Answer) D: Digestion of Food

Description:

An enzyme is a type of protein found within a cell. Enzymes create chemical reactions in the body. They actually speed up the rate of a chemical reaction to help support life. The enzymes in your body help to perform very important tasks. These include building muscle, destroying toxins, and breaking down food particles during digestion.
Resource:
https://www.healthline.com/health/why-are-enzymes-important

Correct Answer) C: Hydrogen

Description:

All acids contain hydrogen. On reacting with metals, all acids produce hydrogen gas. All acids produce hydrogen ions in water. Compounds that contain hydrogen but do not generate hydrogen ions in aqueous medium are not acidic.

Correct Answer) C: Argon (Ar)

Description:

The most abundant naturally occurring gas is Nitrogen (N2), which makes up about 78% of air. Oxygen (O2) is the second most abundant gas at about 21%. The inert gas Argon (Ar) is the third most abundant gas at .93%. There are also trace amounts of carbon dioxide (CO2), neon (Ne), helium (He), methane (CH4), krypton (Kr), hydrogen (H2), nitrous oxide (NO), xenon (Xe), ozone (O3), iodine (I2), carbon monoxide (CO), and ammonia (NH3) in the atmosphere.
Resource:
https://scied.ucar.edu/learning-zone/air-quality/whats-in-the-air

Correct Answer) D: deltoid

Description:

The Deltoid muscle is a large triangular shaped muscle which lies over the glenohumeral joint and which gives the shoulder its rounded contour. It is named after the Greek letter delta, which is shaped like an equilateral triangle. It comprises 3 distinct portions each of which produces a different movement of the glenohumeral joint, commonly named the anterior, mid (or lateral) and posterior heads.
Resource:
https://www.physio-pedia.com/Deltoid

Correct Answer) B: troposphere

Description:

The troposphere is the first and lowest layer of the atmosphere of the Earth, and contains 75% of the total mass of the planetary atmosphere, 99% of the total mass of water vapour and aerosols, and is where most weather phenomenon occur. Commercial aircrafts usually fly in troposphere for two reasons: the air is thin enough to minimize drag, yet it’s also thick enough to produce an adequate amount of lift. For these reasons, commercial jets almost always fly in the troposphere.
Resource:
https://en.wikipedia.org/wiki/Troposphere

Correct Answer) C: vitamin E

Description:

Vitamin E, the major lipid-soluble antioxidant present in all cellular membranes, is an important nutrient for optimal immune function. When animals are fed nutritionally complete diets lacking vitamin E, immune responses are adversely affected. Supplementation of these diets with higher than nutritionally adequate levels of vitamin E enhances immune responses.
Resource:
https://pubmed.ncbi.nlm.nih.gov/3074789/

Correct Answer) D: Ganymede

Description:

One of Jupiter's moons, Ganymede, is the largest moon in the Solar System. Ganymede has a diameter of 3270 miles (5,268 km) and is larger than the planet Mercury. It has a rocky core with a water/ice mantle and a crust of rock and ice. Ganymede has mountains, valleys, craters and old lava flows.
Resource:
https://coolcosmos.ipac.caltech.edu/ask/101-What-is-the-largest-moon-in-the-Solar-System-

Correct Answer) C: Dogs

Description:

The Labrador Retriever, often abbreviated to Labrador or ‘Lab’ is a breed of retriever gun dog from the United Kingdom that was developed from imported Canadian fishing dogs. The Labrador is one of the most popular dog breeds in a number of countries in the world, particularly in the Western world.
Source:
https://en.wikipedia.org/wiki/Labrador_Retriever

Correct Answer) C: Digestive system

Description:

The duodenum is the first part of the small intestine. It is located between the stomach and the middle part of the small intestine, or jejunum. After foods mix with stomach acid, they move into the duodenum, where they mix with bile from the gallbladder and digestive juices from the pancreas. The absorption of vitamins, minerals, and other nutrients begins in the duodenum.
Source:
https://medlineplus.gov/ency/article/002347.htm

Correct Answer) A: Honey

Description:

Honey has been called the only food that truly lasts forever, thanks to its magical chemistry and the handiwork of bees. The nectar from flowers mixes with enzymes inside the bees that extract it, which changes the nectar’s composition and breaks it down into simple sugars that are deposited into honeycombs. Fanning action from the bees’ wings and the enzymes from their stomachs create a liquid that is both highly acidic and low in moisture—truly inhospitable digs for bacterial growth. The processing and sealing of honey also adds to its indefinite shelf life. Despite being low in moisture, honey’s sugars are hygroscopic, which means that they take in moisture from the air. When the heated and strained honey is sealed properly, moisture cannot be absorbed, and the honey stays the same forever. The oldest jar of the sweet stuff ever found is believed to be 5500 years old.
Source:
https://www.mentalfloss.com/article/67560/10-foods-never-or-almost-never-expire

Correct Answer) B: x-ray machine

Description:

The achievements of Curie and her husband Pierre, who died in 1906, are well known. The discovery of radium and polonium allowed us to define the properties of radioactivity, a term coined by the researcher herself. The finding that elements such as uranium emitted radiation was joined in the same period with the discovery of the electron, which proved that the atom was not indivisible as was believed. Curie knew that reaction time was critical to treating wounded troops on the battlefield, but military doctors were forced to work with meagre resources. In particular, X-rays had become an enormously useful tool for surgeons since their discovery by Wilhelm Röntgen in 1895, but the machines were only available in large hospitals. Curie set out to bring radiology to the front lines in cars that housed portable X-ray machines.
Source:
https://www.bbvaopenmind.com/en/science/leading-figures/the-great-invention-of-marie-curie/

Correct Answer) D: Plants and Animals

Description:

Biofuel, any fuel that is derived from biomass—that is, plant or algae material or animal waste. Since such feedstock material can be replenished readily, biofuel is considered to be a source of renewable energy, unlike fossil fuels such as petroleum, coal, and natural gas.
Source:
https://www.britannica.com/technology/biofuel

Correct Answer) B: Graphite

Description:

The core of a pencil does not contain lead and never has. Pencils contain a form of solid carbon known as graphite. According to the book The Pencil by Henry Petroski, the graphite pencil was first developed and popularized in the 1600's. The first users of graphite simply dug this mineral out of the hills and discovered it could be sawed into sticks and used as an excellent writing tool. During the 1600's, no one knew the chemical nature of this material, as chemistry itself was still in its infancy. Since this writing material behaved similar to metallic lead, but had a darker color, people began calling it "black lead".
Source:
https://www.wtamu.edu/~cbaird/sq/2013/04/04/why-is-lead-used-in-pencils-even-though-lead-is-poisonous/

Correct Answer) C: Rayon

Description:

Rayon is a synthetic fiber or man-made fiber or artificial fiber as it is prepared from the natural raw material called cellulose. So, rayon has the same kind of molecular structure just like cellulose.
- The cellulose required for this preparation is obtained from wood pulp by chemical treatment. There are many kinds of viscose rayon fibers which have been made artificially. Some of these fibers have shine and strength and imitate or resemble the feel and texture of natural fibers like silk, wool, cotton and linen. The kind of rayon fibers which imitate the feel and texture of natural silk is therefore termed as ‘artificial silk’.
Source:
https://www.vedantu.com/question-answer/rayon-also-known-as-artificial-silk-give-its-class-9-chemistry-cbse-5f626f45bc188a78430efb9a

Correct Answer) D: Gastrine

Description:

Glands are important organs located throughout the body. They produce and release substances that perform certain functions. Though you have many glands throughout your body, they fall into two types: endocrine and exocrine.
Read more details at:
https://www.examveda.com/which-of-the-following-is-not-a-gland-127503/

Correct Answer) C: Sodium carbonate

Description:

Sodium carbonate, Na2CO3·10H2O, (also known as washing soda, soda ash and soda crystals) is the inorganic compound with the formula Na2CO3 and its various hydrates. All forms are white, odourless, water-soluble salts that yield moderately alkaline solutions in water. Historically, it was extracted from the ashes of plants growing in sodium-rich soils. Because the ashes of these sodium-rich plants were noticeably different from ashes of wood (once used to produce potash), sodium carbonate became known as "soda ash". It is produced in large quantities from sodium chloride and limestone by the Solvay process.
Source:
https://en.wikipedia.org/wiki/Sodium_carbonate

Correct Answer) C: 98.6 degrees Fahrenheit

Description:

Not everyone’s “normal” body temperature is the same. Yours could be a whole degree different than someone else’s. A German doctor in the 19th century set the standard at 98.6 F, but more recent studies say the baseline for most people is closer to 98.2 F. For a typical adult, body temperature can be anywhere from 97 F to 99 F. Babies and children have a little higher range: 97.9 F to 100.4 F.
Source:
https://www.webmd.com/first-aid/normal-body-temperature

Correct Answer) A: Coins and Currency

Description:

Numismatics is the study or collection of currency, including coins, tokens, paper money, medals and related objects. Specialists, known as numismatists, are often characterized as students or collectors of coins, but the discipline also includes the broader study of money and other means of payment used to resolve debts and exchange goods.
Source:
https://en.wikipedia.org/wiki/Numismatics

Correct Answer) B: Optics

Description:

Ḥasan Ibn al-Haytham (c. 965 – c. 1040) was a Muslim Arab mathematician, astronomer, and physicist of the Islamic Golden Age. Referred to as "the father of modern optics", he made significant contributions to the principles of optics and visual perception in particular. His most influential work is titled Kitāb al-Manāẓir ("Book of Optics"), written during 1011–1021, which survived in a Latin edition. A polymath, he also wrote on philosophy, theology and medicine. Ibn al-Haytham was the first to explain that vision occurs when light reflects from an object and then passes to one's eyes. He was also the first to demonstrate that vision occurs in the brain, rather than in the eyes. Building upon a naturalistic, empirical method pioneered by Aristotle in ancient Greece, Ibn al-Haytham was an early proponent of the concept that a hypothesis must be supported by experiments based on confirmable procedures or mathematical evidence—an early pioneer in the scientific method five centuries before Renaissance scientists.
Source:
https://en.wikipedia.org/wiki/Ibn_al-Haytham

Correct Answer) A: Platinum

Description:

Non-metals are natural materials that do not produce heat or electricity and that are structurally brittle (can not be easily rolling, moulding, extruding or pressing). Chemically, hydrogen, carbon, nitrogen, oxygen, phosphorus, arsenic and selenium are the non-metallic elements in the periodic table.
Platinum is a chemical element with the symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name is derived from the Spanish term platino, meaning "little silver". Platinum is a member of the platinum group of elements and group 10 of the periodic table of elements. It has six naturally occurring isotopes. It is one of the rarer elements in Earth's crust, with an average abundance of approximately 5 μg/kg. It occurs in some nickel and copper ores along with some native deposits, mostly in South Africa, which accounts for 80% of the world production. Because of its scarcity in Earth's crust, only a few hundred tonnes are produced annually, and given its important uses, it is highly valuable and is a major precious metal commodity.
Source:
https://byjus.com/chemistry/non-metals/

Source:
https://en.wikipedia.org/wiki/Platinum

Correct Answer) D: Calcium Phosphate

Description:

Calcium phosphate is a family of materials and minerals containing calcium ions (Ca2+) together with inorganic phosphate anions. Some so-called calcium phosphates contain oxide and hydroxide as well. Calcium phosphates are white solids of nutritious value and are found in many living organisms, e.g., bone mineral and tooth enamel. In milk, it exists in a colloidal form in micelles bound to casein protein with magnesium, zinc, and citrate–collectively referred to as colloidal calcium phosphate (CCP). Various calcium phosphate minerals are used in the production of phosphoric acid and fertilizers. Overuse of certain forms of calcium phosphate can lead to nutrient-containing surface runoff and subsequent adverse effects upon receiving waters such as algal blooms and eutrophication.
Source:
https://en.wikipedia.org/wiki/Calcium_phosphate

Correct Answer) D: None of these

Description:

An eggshell is covered with as many as 17,000 tiny pores. Eggshell is made almost entirely of calcium carbonate (CaCO3) crystals. It is a semipermeable membrane, which means that air and moisture can pass through its pores. The shell also has a thin outermost coating called the bloom or cuticle that helps keep out bacteria and dust.
Source:
https://www.exploratorium.edu/cooking/eggs/eggcomposition.html

Correct Answer) B: Ascorbic acid

Description:

Vitamin C is a vitamin found in various foods and sold as a dietary supplement. It is used to prevent and treat scurvy. Vitamin C is an essential nutrient involved in the repair of tissue and the enzymatic production of certain neurotransmitters.
Formula: C6H8O6
Source:
https://en.wikipedia.org/wiki/Vitamin_C

Correct Answer) C: Mercury

Description:

The smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's Moon. From the surface of Mercury, the Sun would appear more than three times as large as it does when viewed from Earth, and the sunlight would be as much as seven times brighter. Despite its proximity to the Sun, Mercury is not the hottest planet in our solar system – that title belongs to nearby Venus, thanks to its dense atmosphere. But Mercury is the fastest planet, zipping around the Sun every 88 Earth days.
Source:
https://solarsystem.nasa.gov/planets/mercury/in-depth/

Correct Answer) D: Respiration

Description:

Thus, during photosynthesis a plant consumes water, carbon dioxide, and light energy, and produces glucose and oxygen. The sugar glucose is important because it is necessary for cellular respiration. During cellular respiration, the chemical energy in the glucose molecule is converted into a form that the plant can use for growth and reproduction. In the first step of respiration, called glycolysis, the glucose molecule is broken down into two smaller molecules called pyruvate, and a little energy is released in the form of ATP.
Source:
http://scienceline.ucsb.edu/getkey.php?key=153